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Number Operations

Addition, Subtraction, Multiplication, Division

There are 18 videos in this category and 662 videos in 82 subcategories.

Category Videos
Not Right For WatchKnowLearn
Ages: 7 - 10
2888 Views:
+ and - Without Regrouping - by StudyJams
From scholastic.com, produced by Scholastic
Addition is really about finding sums, or totals.  Subtraction is about finding the difference between two numbers.  Learn more about adding and subtracting without regrouping with this step-by-step, interactive video from StudyJams.  A short, self-c... [more]
June 18, 2011 at 10:40 PM
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Not Right For WatchKnowLearn
Ages: 4 - 13
1705 Views:
Explanation on Order of Operations
From math-videos-online.com
This short video teaches you how to use the order of operations correctly. They use Please Excuse My Dear Aunt Sally. Please - Parenthesis, Excuse - Exponents, My - Multiplication, Dear - Division, Aunt - Addition, and Sally - Subtraction as a mnem... [more]
February 15, 2012 at 01:57 PM
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Not Right For WatchKnowLearn
Ages: 6 - 11
7155 Views:
Two-Digit Addition With Regrouping/ Two-Digit plus One-Digit Mental Math
From discoveryeducation.com, produced by Discovery Education
In this computer-animated video, students are taught to add two digit numbers using regrouping.  Students are also shown a strategy for adding two-digit and one-digit numbers using mental math. (03:23)
November 28, 2010 at 06:55 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
5044 Views:
Basic Math: Sieve of Eratosthenes
From YouTube, produced by VideoMathTutor.com
This lesson consists of showing you how to use the Sieve of Eratosthenes to find all prime numbers below a certain value. In this case, below 100.
November 9, 2009 at 04:02 AM
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Not Right For WatchKnowLearn
Ages: 6 - 11
2062 Views:
Mental Math Strategies--Addition & Subtraction Relationship
From YouTube, produced by youtube
In this video, Mr. Almeida explains how to use mental strategies to add and subtract within 20 using the relationship between addition and subtraction. This is one of the strategies suggested in the Common Core State Standards for Mathematics, 1.OA.6... [more]
April 21, 2012 at 09:49 PM
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Not Right For WatchKnowLearn
Ages: 7 - 9
1977 Views:
The Commutative Property of Addition
From teachertube.com
Explanation and example of commutative propety of Addition
November 22, 2010 at 10:31 PM
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Not Right For WatchKnowLearn
Ages: 11 - 13
1927 Views:
Juggling with Algebra
From teachers.tv, produced by Peter Evans
A fun lesson. Nicholas Hyde, head of science in a school in England teaches Grade 6 maths students how to analyse juggling techniques to introduce number sequences and algebra. (In England people say "maths" instead of "math")
June 16, 2010 at 12:18 PM
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Not Right For WatchKnowLearn
Ages: 13 - 18
1153 Views:
Operaciones Básicas con Números Reales (en Español)
From YouTube
En este video, el profesor habla sobre varias operaciones básicas. Empieza con el valor absoluto y sigue con la suma de enteros, resta de enteros, multiplicación de enteros, y la división de enteros. El video ofrece ejemplos de cada operacion. (10:17... [more]
February 4, 2012 at 04:45 PM
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Not Right For WatchKnowLearn
Ages: 5 - 9
314 Views:
Corporal Cup's Food Camp (Interactive Game)
From pbskids.org, produced by KAET
In this "Fizzy's Lunch Lab" interactive, students use math to complete Corporal Cup's challenges that involve sorting, counting and measuring. Unlock her top secret recipes by counting types of fruits, completing fruit equations and measuring food sl... [more]
June 18, 2012 at 11:42 AM
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Not Right For WatchKnowLearn
Ages: 6 - 12
277 Views:
Mental Math Strategies --Make 10 Strategy
From YouTube, produced by youtube
In this video, Mr. Almeida explains how to use mental strategies to add within 20 using the "make 10" strategy. This is one of the strategies suggested in the Common Core State Standards for Mathematics, 1.OA.6 and 2.OA.2. With practice, this strateg... [more]
April 21, 2012 at 09:56 PM
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